Nu-Air WINDSOR SERIES, Operating And Installation Instruction

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Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual
Rev. 2.3 Aug. 19, 2014
- 7 -

Keep use of flexible ducting to a minimum.

Be sure to observe local codes regarding running and insulating ducts in unconditioned spaces.
Poorly insulated ducts run in unconditioned spaces will hamper the efficiency of the HRV.
Sizing the System
For residential applications you should have a minimum ventilation capacity of 10 cfm (5 L/s) per room.
The chart that accompanies the flow grid calibrates pressure readings to airflow. Refer to ASHRAE
Standard 62 for acceptable ventilation rates in commercial buildings.
Calculating TVC (Total ventilation Capacity) for Residential Applications:

20 cfm for the master bedroom

20 cfm for an unfinished basement

10 cfm for each other room in the house
Add these together to arrive at your TVC.
This method is called the “Room Count Method” and is part of CSA F326 (Residential Mechanical
Ventilation Systems). 0.3 air change per hour is no longer used.
Areas typically serviced by Fresh Air
: Bedrooms, Living Rooms, Dining Areas, and Recreation Areas.
Areas typically serviced by Exhaust Air : Laundry Rooms, Kitchens, Bathrooms, other wet rooms.
Note
Kitchen exhaust grills should be equipped with a grease filter and must be located at least 3 ft.
horizontally in all directions from the surface of the range extended to the ceiling.
3.2.
Installation System Options
Before installing your HRV, please read these
instructions for correct installation. The
Nu-Air HRV
is a self-contained system that is ready to be installed.
There are
three commonly used and approved
methods of installation.
3.2.1.
The Fully Ducted System
This system uses an independent duct system for
supply and exhaust air. The HRV is controlled
independently of all other equipment.
The best results are achieved when:

Each room of the space is serviced with a vent
mounted in the ceiling or high on an interior wall (within 12" of the ceiling).

Vents are located deep within a room, where they will not short circuit or create an
uncomfortable draft.